Numbers k such that 419*2^k+1 is prime.

Terms

a(0) =1a(1) =7a(2) =11a(3) =19a(4) =53a(5) =91a(6) =133a(7) =187a(8) =211a(9) =263a(10) =281a(11) =331a(12) =437a(13) =793a(14) =1151a(15) =3689a(16) =6547a(17) =13771a(18) =14749a(19) =32009a(20) =32843a(21) =46223a(22) =79801a(23) =169463a(24) =180733a(25) =463079a(26) =2552363